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Updated: May 2, 2025


He is the principal control dominating the writing of this book. He appeared very patriarchal with a long beard. His features were decidedly semitic. His countenance was most spiritual and beautiful. On February 10 I had my first vision of Mars' two moons, known to our astronomers as Diemos and Phobos.

Since Mars takes twenty-four hours and thirty-seven minutes for one rotation on its axis, it is evident that Phobos goes round the planet three times in the course of a single Martian day and night, rising, contrary to the general motion of the heavens, in the west, running in a few hours through all the phases that our moon exhibits in the course of a month, and setting, where the sun and all the stars rise, in the east.

Thorwald says the two planets were nearer each other at the recent opposition than ever before since their records began, and this is probably what drew our moon here, so fortunately for us. For the return trip we might get these generous people to loan us Demios or Phobos." "What are they?" "Why, don't you know?

The inner one, Phobos, is considerably larger, having a diameter of about twenty miles. It is but twenty-seven hundred miles from Mars's surface, and completes its revolution in seven hours and thirty-eight minutes, which is shorter than any other known period, Jupiter's nearest moon being the next, with eleven hours and fifty- nine minutes.

And then when we've examined him we'll pay a visit to his brother and take a trip round Mars on him. Phobos does the journey in about seven hours and a half, and as he's only three thousand seven hundred miles above the surface, we ought to get a very good view of our next stopping-place." "That ought to be quite delightful," said Zaidie. "But how commonplace you are getting, Lenox.

An hour later the Miran returned, passed the still-lightless ship at a distance of five million miles, and settled to Phobos for the slight repairs needed. Twelve hours later, the T-253 settled to Luna, for the many rearrangements she would need. "I rather knew it was coming," Kendall admitted sadly, "but danged if I didn't forget all about it.

This suggestion was immediately accepted, and the squadron having been signalled to assemble quickly bore off in the direction of the more distant moon of Mars, Deimos. We knew that it was slightly smaller than Phobos but its greater distance gave promise that it would better serve our purpose of temporary concealment.

The prince, a thin, elderly man of medium stature, smiled admiringly. His sharp features and bright little button eyes gave some hint of the energy which suffused him. Here was a man both ruthless and loyal to his royal house. He addressed her by her given name. "The hour seems to make no difference with you; Phobos has set, but as long as you are awake there is loveliness enough.

Its period of 11h. 57m. 23s. is just two hours longer than Jupiter's period of rotation, so that Phobos still remains a unique example of a secondary body revolving faster than its primary rotates.

"We must be ready to repel boarders," said Bearwarden, observing it for the first time and fixing his glass upon it. "That must be Phobos."

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